Whitepaper on Link Power Management (LPM) in USB 3.0 Hardware


This paper provides information about certain limitations of the Universal Serial Bus (USB) 2.0 selective suspend mechanism. It provides guidelines for independent hardware vendors (IHVs) and original equipment manufacturers (OEMs) to implement power management for USB devices by using USB 3.0 Link Power Management (LPM) in conjunction with selective suspend. It also provides information about common pitfalls in LPM implementation in USB controllers, hubs, and devices.

Read the whitepaper at: Link Power Management in USB 3.0 Hardware

Comments (4)

  1. Does Microsoft recommend users modifying the value of 'MaximumTransferLength' in the registry as per KB2581464 to improve USB performance if the OEM/hardware vendor hasn't in the INF file?

  2. wiseman says:

    are there downloadable  tools which can help detect the conditions mentioned in the white paper?

    Thx,

  3. USB Blog says:

    We’re not aware of any tools.

  4. Tim Chuang says:

    I want to verify "USB Link Power Manager" function at my USB 2.0 device on Ivy Bridge(Chipset E55). But I don't know how to enable this function on win8 . can you help me? Thank you~